We have to careful on food that we consumed everyday, because there are so much of pollution. Therefore, we have to know what the pollution source.1. Pollution on agricultureUse of artificial chemical fertilizers (Urea, ZA, NPK etc.), poison to kill destructive pests (pesticides, insecticides, etc.), farm fields and rice fields of agriculture, we also have gross pollution from factories, vehicles and smoke pollution sources other.

2. Pollution on livestockUse of hormones growth, injection of vaccine, antibiotics and vaccines in animals. So that the animal products such as meat, milk and egg consumption, which often we have also dirty.